OPINION OF THE COURT
This is an appeal from convictions under the Comprehensive Drug Abuse Prevention and Control Act of 1970 (Controlled Substances Act), 21 U.S.C. §§ 841(a)(1), 846 (1982), and the federal aiding and abetting statute, 18 U.S.C. § 2 (1982). Two primary issues are presented. First, we must consider whether the district court erred as a matter of law in refusing to charge the jury that § 846 requires proof of an overt act to sustain a conviction for conspiracy to distribute heroin. Second, we must determine whether the district court committed plain error in its instruction to the jury on the charge of aiding and abetting. We hold that the district court did not err in either regard, and thus we will affirm the convictions.
I.
In May 1982, Earl Wilson, an informant for the Philadelphia Task Force of the Drug Enforcement Administration, introduced undercover police officer Kenneth Lamar to Elijah Harris, a suspected heroin dealer, so that Lamar could purchase heroin through Harris. After several phone calls to his “source,” Harris requested and received payment from Lamar. Harris then accompanied Wilson and Lamar to a house on Mt. Vernon Street in Philadelphia. While Wilson and Lamar remained outside, Harris went up to the house where a man, later identified as Gabriel Bey, the appellant here, was standing in the doorway. Harris and Bey conferred and then entered the house. A few minutes later Harris came out with five bundles of heroin which he gave to Lamar.
The next month, Lamar and Wilson returned to the Mt. Vernon Street house to obtain more heroin. Bey answered the door and explained that he had no heroin in the house, but could get some. He and Wilson then drove, in Bey’s automobile, to a bar. Bey went into the bar and returned with a brown paper bag. Bey and Wilson drove back to the house where Lamar was parked, and, in Lamar’s car, exchanged 10 bundles of heroin for $400. Bey wrote his telephone number on a card, and then handed the card to Lamar.
In February 1983, Wilson and Lamar went to the Mt. Vernon Street house where they again met Bey, who invited them inside. There, Lamar purchased 17 bundles of heroin from Bey for $300. Three months later, Bey and Harris were arrested.
The government returned a five-count indictment charging Harris and Bey variously with distribution of heroin, conspiracy to distribute heroin, and aiding and *893 abetting the distribution of heroin. 1 After a two-day trial, a jury found both Harris and Bey guilty of all counts. Bey was sentenced to concurrent five-year terms of imprisonment for counts I, IV, and V, as well as concurrent five-year special parole terms for counts III, IV, and V. Bey filed a timely notice of appeal. 2
II
The first question is whether the Controlled Substances Act, 21 U.S.C. § 846 (1982), requires proof of an overt act in furtherance of the conspiracy. Section 846 provides:
Any person who attempts or conspires to commit any offense defined in this sub-chapter is punishable by imprisonment and fine or both which may not exceed the maximum punishment prescribed for the offense, the commission of which was the object of the attempt or conspiracy.
21 U.S.C. § 846 (1982).
Of the courts of appeals that have considered the question of proof of an overt-act under § 846, only two, the Sixth and. Eighth, require such proof.
See U.S. v. Meyers,
Appellant urges that we formally adopt the minority view and read into § 846 the requirement that an overt act is an essential element of a drug conspiracy. We take this opportunity to reexamine our earlier position.
The starting point for interpreting a statute must be the language of the statute itself. Absent a clearly expressed legislative intention to the contrary, the .statutory language must be regarded as conclusive.
Consumer Prod. Safety Comm’n v. GTE Sylvania,
447. U.S. 102, 108,
Nothing in the legislative history of either the 1951 amendment or the current Controlled Substances Act discloses an intention on the part of Congress to impose an additional requirement on the drug conspiracy provision thus making it similar to 18 U.S.C. § 371. Nor has Congress altered the language of the conspiracy provision in any material way since 1951. As the Supreme Court noted in
Albernaz v. U.S.,
Having determined that Congress did not intend to require proof of an overt act in these circumstances, we must next consider whether an overt act in furtherance of a drug conspiracy is required by the Constitution. The Supreme Court has indicated that it regards the function of the overt act in a conspiracy prosecution not as a constitutional requirement, but simply as a manifestation that the conspiracy is underway.
See Yates v. U.S.,
In
Nash v. U.S.,
Thus, there is no constitutional need for an overt act in furtherance of the conspiracy; the overt act is mandatory only when required by statute, usually for evidentiary or jurisdictional purposes.
See U.S. v. Wander,
Because we are unable to identify either a statutory or constitutional requirement that an overt act must be alleged and proven to sustain a conspiracy conviction under the Controlled Substance Act, we hold that the district court’s instructions to the jury on the conspiracy charge were not erroneous as a matter of law.
Ill
Bey next claims that the Court’s instructions to the jury on the charge of aiding and abetting under 18 U.S.C. § 2 (1982) were insufficient.
7
He concedes, however, that his counsel did not object at trial to the instruction and therefore that this Court may review it only for plain error.
See U.S. v. Provenzano,
The trial court charged the jury that one who knowingly and intentionally aides (sic), abets or counsels an unlawful act [is] subject to liability for that act, the same as if he were the person who committed the act or did the act or the principal person involved.
Bey argues that the instruction fails to indicate that aiding and abetting must be done willfully, with the specific intent to bring about the crime charged in the indictment, that is, the distribution of heroin. At oral argument the government conceded that the judge did not use the word “willfully” in the instruction, but contended that the words “knowingly” and “intentionally” were substantially equivalent and, therefore, the instruction was not plainly erroneous.
To support a conviction on a charge of aiding and abetting another to commit a crime, the prosecution must show that the defendant “in some sort associate^] himself with the venture, that he participate^] in it as in something that he wishe[d] to bring about, that he [sought] by his action to make it succeed.”
Nye & Nissen v. U.S.,
Adequacy of a jury charge must be determined by examining the instructions in their entirety.
U.S. v. Falsia,
IV
The judgment of the district court will be affirmed.
Notes
. Count I charged Bey and Harris with conspiracy to distribute heroin in violation of 21 U.S.C. § 846 (1982). Count II charged Harris with distribution of heroin in violation of 21 U.S.C. § 841(a)(1) (1982). Count III charged Bey with aiding and abetting the distribution of heroin by Harris in violation of 18 U.S.C. § 2 and 21 U.S.C. § 841(a)(1) (1982). Counts IV and V charged Bey with distribution of heroin in violation of 21 U.S.C. § 841(a)(1) (1982).
. The appellant requests that this Court refrain from invoking the concurrent sentence doctrine to avoid reaching the substantive issues. Under the concurrent sentence doctrine, an appellate court, in its discretion, may avoid resolution of legal issues affecting less than all the counts in an indictment where at least one count has been upheld and the sentences are concurrent.
U.S. v. Lampley,
. 18 U.S.C. § 371 (1982) provides:
If two or more persons conspire either to commit any offense against the United States, or to defraud the United States, or any agency thereof in any manner or for any purpose, and one or more of such persons do any act to effect the object of the conspiracy, each shall be fined not more than $10,000 or imprisoned not more than five years, or both. If, however, the offense, the commission of which is the object of the conspiracy, is a misdemeanor only, the punishment for such conspiracy shall not exceed the maximum punishment provided for such misdemeanor.
. Section 2557(b)(1) of the Internal Revenue Code was amended to read:
Whoever commits an offense or conspires to commit an offense described in this subchapter, subchapter C of this chapter, or parts V or VI of subchapter A of chapter 27, for which no specific penalty is otherwise provided, shall be fined not more than $2,000 and imprisoned not less than two or more than five years.
26 U.S.C. § 2557(b)(1) (1952).
. At common law, the only act required for a conspiracy is the act of entering into an agreement.
Hogan v. O’Neill,
. Insofar as the overt act requirement has served as a mechanism to corroborate the exist
*895
ence of a conspiracy, its omission in § 826 imposes a responsibility on the courts to employ other means of insuring the sufficiency of evidence against an accused narcotics conspirator. The absence of an overt act requirement does not eliminate the necessity for proof that an agreement has been formed with the specific intent to commit the prohibited act.
U.S. v. Klein,
. 18 U.S.C. § 2 (1982) states:
(a) Whoever commits an offense against the United States or aids, abets, counsels, commands, induces or procures its commission, is punishable as a principal.
(b) Whoever willfully causes an act to be done which if directly performed by him or another would be an offense against the United States, is punishable as a principal.
. This is not to suggest that the instruction on aiding and abetting was flawless. The explanation of the specific intent necessary to support a conviction for aiding and abetting was somewhat circuitous and lacking in the clarity desirable in a jury charge.
